Sprocket



FIG. 1 is a front elevational view of a first embodiment of a sprocket showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof; and

FIG. 6 is a right side elevational view thereof.

FIG. 7 is a front elevational view of a second embodiment of a sprocket showing our new design; and,

FIG. 8 is a rear elevational view of FIG. 7. The rest of the views of the second embodiment are the same as those of the first embodiment. 

The ornamental design for a sprocket, as shown and described. 